Command Block Train v2.0

Just a train i made in minecraft 1.20.4. It is better than the original because now its an modern passenger train with 3 passenger cars, also now it is furnished. Also now easier to use because it now does not flashes, but the negative feature is that it's going too fast. Can someone attempt to slow down the train speed?

How to use it:

1. Go to the command block with sign saying "Spawn Train" and press the button
2. Go inside the locomotive
3. Press the button on the command block with sign saying "Start Train"
4. Done!